exam Maths Puzzle Numerical Ability

Solve the system of equation
5x+y=12
2x=3y-19

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exam Other Question

how do you simplify polynomials? Please help!
The ellipse:
(x^2/9)+(y^2/16)=1 is which of the following?
1. a vertical ellipse with foci at (0,+-sqrt7)
2. a horizontal ellipse with foci at (+-sqrt7,0)
3. an e